forgejo/routers/web/auth/u2f.go

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2022-01-02 13:12:35 +00:00
// Copyright 2017 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package auth
import (
"errors"
"net/http"
"code.gitea.io/gitea/models/auth"
user_model "code.gitea.io/gitea/models/user"
"code.gitea.io/gitea/modules/base"
"code.gitea.io/gitea/modules/context"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/web"
"code.gitea.io/gitea/services/externalaccount"
"github.com/tstranex/u2f"
)
var tplU2F base.TplName = "user/auth/u2f"
// U2F shows the U2F login page
func U2F(ctx *context.Context) {
ctx.Data["Title"] = ctx.Tr("twofa")
ctx.Data["RequireU2F"] = true
// Check auto-login.
if checkAutoLogin(ctx) {
return
}
// Ensure user is in a 2FA session.
if ctx.Session.Get("twofaUid") == nil {
ctx.ServerError("UserSignIn", errors.New("not in U2F session"))
return
}
// See whether TOTP is also available.
if ctx.Session.Get("totpEnrolled") != nil {
ctx.Data["TOTPEnrolled"] = true
}
ctx.HTML(http.StatusOK, tplU2F)
}
// U2FChallenge submits a sign challenge to the browser
func U2FChallenge(ctx *context.Context) {
// Ensure user is in a U2F session.
idSess := ctx.Session.Get("twofaUid")
if idSess == nil {
ctx.ServerError("UserSignIn", errors.New("not in U2F session"))
return
}
id := idSess.(int64)
regs, err := auth.GetU2FRegistrationsByUID(id)
if err != nil {
ctx.ServerError("UserSignIn", err)
return
}
if len(regs) == 0 {
ctx.ServerError("UserSignIn", errors.New("no device registered"))
return
}
challenge, err := u2f.NewChallenge(setting.U2F.AppID, setting.U2F.TrustedFacets)
if err != nil {
ctx.ServerError("u2f.NewChallenge", err)
return
}
if err := ctx.Session.Set("u2fChallenge", challenge); err != nil {
ctx.ServerError("UserSignIn: unable to set u2fChallenge in session", err)
return
}
if err := ctx.Session.Release(); err != nil {
ctx.ServerError("UserSignIn: unable to store session", err)
}
ctx.JSON(http.StatusOK, challenge.SignRequest(regs.ToRegistrations()))
}
// U2FSign authenticates the user by signResp
func U2FSign(ctx *context.Context) {
signResp := web.GetForm(ctx).(*u2f.SignResponse)
challSess := ctx.Session.Get("u2fChallenge")
idSess := ctx.Session.Get("twofaUid")
if challSess == nil || idSess == nil {
ctx.ServerError("UserSignIn", errors.New("not in U2F session"))
return
}
challenge := challSess.(*u2f.Challenge)
id := idSess.(int64)
regs, err := auth.GetU2FRegistrationsByUID(id)
if err != nil {
ctx.ServerError("UserSignIn", err)
return
}
for _, reg := range regs {
r, err := reg.Parse()
if err != nil {
log.Error("parsing u2f registration: %v", err)
continue
}
newCounter, authErr := r.Authenticate(*signResp, *challenge, reg.Counter)
if authErr == nil {
reg.Counter = newCounter
user, err := user_model.GetUserByID(id)
if err != nil {
ctx.ServerError("UserSignIn", err)
return
}
remember := ctx.Session.Get("twofaRemember").(bool)
if err := reg.UpdateCounter(); err != nil {
ctx.ServerError("UserSignIn", err)
return
}
if ctx.Session.Get("linkAccount") != nil {
if err := externalaccount.LinkAccountFromStore(ctx.Session, user); err != nil {
ctx.ServerError("UserSignIn", err)
return
}
}
redirect := handleSignInFull(ctx, user, remember, false)
if ctx.Written() {
return
}
if redirect == "" {
redirect = setting.AppSubURL + "/"
}
ctx.PlainText(http.StatusOK, redirect)
return
}
}
ctx.Error(http.StatusUnauthorized)
}